Police were blocking the entrance to Kane Hall, and investigators said bricks and paint were thrown at officers.

Shooting victim in serious condition at Harborview Medical Center.

The suspect, accompanied by another individual, turned turn himself in to UW police detectives.

Both individuals were taken into custody and later released pending further investigation.

The University of Washington College Republicans invited Yiannopoulos to speak on Friday, the day of Donald Trump's inauguration. People hoping to attend the event started gathering on campus around 5 p.m.

Protesters from the Westlake Park rally were only about two blocks away from UW before the shooting happened.

UW campus police said as its department worked with SPD, officers struggled with maintaining the line of people waiting to attend the event. While officers were trying to monitor the event, they received the report that someone was shot.

KIRO 7 Chopper caught video of bike officers rushing to a crowd of people shortly after the shooting. Moments later they were responding to a man on the ground.

The 34-year-old man was taken to Harborview Medical Center, where he underwent surgery. He was in critical condition. The man was previously identified by authorities as a 25-year-old.

On Saturday morning, hospital officials said the victim was in critical but stable condition.

By Sunday, he had improved to serious condition in the ICU at Harborview and was breathing on his own.

Police clad in riot gear surrounded Red Square late Friday night.

A UW alert went out to students' phones, telling them to stay out of the area after the shooting. Another alert later went out with the suspect's description.

UW students were alerted to the suspected shooters arrest early Saturday morning.

The suspect, accompanied by another individual, turned turn himself in to UW police detectives following the incident.

Both individuals were taken into custody. They were released hours later on Saturday pending further investigation.

Seattle police responded to an assault report of a "head injury" about a block away from the campus around 9:15 p.m., but the department did not provide further details.

Leaders respond to shooting after day of demonstrations

Mayor Ed Murray released a statement as police searched for the gunman.

"Seattle has a long, proud tradition of speaking up and speaking out, but we will not tolerate violence of any kind, against any person. Thousands of Seattleites, including myself, will speak up and march peacefully throughout this weekend," Murray said.

Seattle and UW campus police held a news conference late on Friday night. They told a room of reporters that they have been planning for weeks for protests; campus police prepped for nearly the last month.

Police chief Kathleen O'Toole said that officers oversaw several successful demonstrations without injuries, with the exception of the UW protest, on Friday.

Earlier in Seattle, protesters from Capitol Hill and Central District neighborhoods streamed downtown for an afternoon immigrant and refugee rights rally. Carrying signs that said “Fight Racism & Sexism” and “Resist Trump,” people from the earlier rallies met at Westlake Park downtown Friday afternoon. From Westlake Park, protesters marched through downtown and back to Capitol Hill. As mentioned earlier, some protesters from Westlake proceeded to the U-District. Read about those events in details here.

Call to ban Yiannopoulos

"Please make the right choice President Ana Mari Cauce and stand up for student safety and tolerance on campus. Please stand with us - your students, faculty, staff, workers, and community members in opposing this hatred from being spread on our campus," the petition said.

Discriminatory harassment. Discriminatory harassment is language or conduct directed at a person because of the person's race, color, creed, religion, national origin, citizenship, sex, age, pregnancy, marital status, sexual orientation, gender identity or expression, disability, or veteran status that is unwelcome and sufficiently severe, persistent, or pervasive such that it could reasonably be expected to create an intimidating, hostile, or offensive environment, or has the purpose or effect of unreasonably interfering with a person's academic or work performance, or the person's ability to participate in or benefit from the university's programs, services, opportunities, or activities.

The petition had more than 4,600 supporters. It was posted after the November election, around the time when UW College Republicans announced Yiannopoulos' event.

On Yiannopoulo' Facebook page Friday afternoon, he posted a screengrab from a Twitter user that said, "Thought there were riots in D.C. today? Wait until the Milo event tonight at @UW."

The move followed a tense online stand-off between Yiannopoulos and "Ghostbusters" actress Leslie Jones, who faced an onslaught of harassment from Yiannopoulos and his supporters on Twitter. Jones turned heads when, instead of ignoring or blocking the offensive tweets, she decided to retweet them to her followers, who number more than a quarter of a million.